﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleTest
{
    class Program
    {
        static void Main(string[] args)
        {
            B b= new B();
            Console.WriteLine((typeof (A) == typeof(IInt)) ? "yes" : "no");
            Console.ReadKey();

        }
    }

     class A:IInt {}
     class B : A {}

    internal interface IInt
    {
        
    }
}
